// 头部
.header {
    position: sticky;
    top: 0;
    left: 0;
    z-index: 1000;
    .navbar {
        height: 6em;
        margin-bottom: 0;
        padding-bottom: 7em;

        .container {
            width: 80%;

            .navbar-toggle {
                padding: 2em 2em;
            }

            img {
                width: 8em;
            }

            .navbar-nav>li>a {
                font-size: 1.5em;
                line-height: 4em;

                &:hover {
                    color: #51a746;
                }

            }


        }
    }
}

// promo
.promo {
    height: 50em;
    background: url(../images/background/promo-bg-3.jpg)no-repeat;
    background-size: 100% 100%;

    .subject {
        text-align: center;
        padding-top: 6em;
        padding-bottom: 8em;


        .top {
            color: #fff;
            font-weight: bold;
            font-size: 8em;

            span {
                color: lawngreen;
            }
        }

        .bottom {
            color: #fff;
            font-size: 3em;
        }
    }

    .email {
        text-align: center;
        background: rgba(000, 000, 000, .3);
        padding-bottom: 5em;

        .top {
            color: #fff;
            font-size: 2em;
            line-height: 3.7em;
        }

        .bottom {

            input:nth-child(1) {
                width: 35em;
                height: 3.5em;
                border-radius: .5em;
            }

            .btn {
                width: 6em;
                height: 3.5em;
            }
        }
    }

    .green {
        width: 100%;
        height: 3.5em;
        background: rgba(28, 184, 41, 0.3);
    }

    @media screen and(max-width:900px) {
        .subject {
            padding-bottom: 23em;

            .top {
                color: #fff;
                font-weight: bold;
                font-size: 3em;

                span {
                    color: #51a746;
                }
            }

            .bottom {
                color: #fff;
                font-size: 1.5em;
            }
        }


        .email {
            padding-bottom: 5em;

            .top {
                font-size: 1em;
                line-height: 3em;
            }

            .bottom {

                input:nth-child(1) {
                    width: 20em;
                    height: 2.5em;
                    border-radius: .5em;
                }

                .btn {
                    width: 5em;
                    height: 2.5em;
                }
            }
        }

    }

}

// start
.start {
    text-align: center;
    margin-bottom: 5em;
    .box {
        .top {
            font-size: 3em;
            font-weight: bold;
            padding-bottom: 1em;

        }

        .centre {
            font-size: 1.5em;
            color: #999;
            padding-bottom: 1em;
        }

        .bottom {
            
            input:nth-child(1) {
                width: 30em;
                height: 3em;
                border-radius: .5em;
            }

            .btn{
                width: 5em;
                height: 3em;
            }
        }

        @media screen and(max-width:750px){
            .top{
                font-size: 1.5em;
            }
            .centre{
                font-size: 1em;
            }
            .bottom{
                input:nth-child(1) {
                    width: 15em;
                    height: 2em;
                    border-radius: .2em;
                }
                .btn{
                    width: 4em;
                    height: 2em;
                }
            }
        }

    }

}

// footer
.footer{
    background-color: #7fd474;
    
    .box{
        display: flex;
        justify-content: space-evenly;
        padding: 2em;
        .left{
            width: 30%;
            

            .top{
                font-size: 1.5em;
                line-height: 3em;
            }
            
            .bottom{
                font-size: 1.1em;
            }
        }

        .centre{
            .top{
                font-size: 1.5em;
                line-height: 3em;
            }   

            .bottom{
                display: flex;
                flex-direction: column;
                font-size: 1.3em;
                line-height: 2em;
                a{
                    color: rgba(0,0,0,.5);
                    &:hover{
                        color: rgba(0,0,0,1);
                    }
                }

            }
        }

        .right{
            .top{
                font-size: 1.5em;
                line-height: 3em;
            }
            .bottom{
                font-size: 1.2em;
                line-height: 2em;
            }
        }
    }
    @media screen and(max-width:750px){
        .box{
            flex-direction: column;
            .left{
                width: 100%;
            }
        }
    }
}

// 返回顶部
.gotop{
    position: fixed;
  bottom: 90px;
  right: 3%;
  width: 2em;
  text-align: center;
  background: #51a746;
  z-index: 99998;
  
  transition: all linear .1s;
  a{
      font-size: 1.5em;
      color: #fff;
      font-weight: bold;
  }
}